|Some of my azaleas have a brown,rusty like appearance on the leaves. New leaves appeared and now they have turned rusty colored. What is this and how can I eliminate this disease?
|Answer from NGA
May 26, 2010
|Unless you see orange or brown colored pustules with powdery spores on top, I don't think what you are seeing is rust. It's more likely a cultural problem or a sign of spider mite damage. Spider mite injury appears as a bronzing or rusty coloration of green leaves so check the undersides of the leaves for webbing or tiny little spidermites. If you find them, you can use insecticidal soap or a miticide to control the pests.
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